configure travis CI to build the runtime just once on PRs

Author: petekanev

.travis.yml

@@ -33,7 +33,10 @@ matrix:
       git:
         submodules: false
       script:
-        - "./gradlew -PpreReleaseVersion=$PACKAGE_VERSION -PgitCommitVersion=$TRAVIS_COMMIT --stacktrace"
+        # (PR) build the runtime only once, with the c++ code optimizations 
+        - 'if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then bash ./gradlew -PskipUnoptimized -PpreReleaseVersion=$PACKAGE_VERSION -PgitCommitVersion=$TRAVIS_COMMIT --stacktrace; fi'
+        # (master branch) build the runtime twice - optimized, and regular packages
+        - 'if [ "$TRAVIS_PULL_REQUEST" = "false" ]; then bash ./gradlew -PpreReleaseVersion=$PACKAGE_VERSION -PgitCommitVersion=$TRAVIS_COMMIT --stacktrace; fi'
         - echo no | android create avd --force -n $EMULATOR_NAME-$EMULATOR_API_LEVEL -t android-$EMULATOR_API_LEVEL --abi $ANDROID_ABI -c 12M
         - emulator -avd $EMULATOR_NAME-$EMULATOR_API_LEVEL -no-skin -no-audio -no-window &
         - android-wait-for-emulator

build.gradle

@@ -18,6 +18,7 @@ def localMetadataGen = "../android-metadata-generator/dist/tns-android-metadata-
 def distDir = "$projectDir/dist"
 def pVersion = "no package version was provided by build.gradle build"
 def arVersion = "no commit sha was provided by build.gradle build"
+def generateRegularRuntimePackage = !project.hasProperty("skipUnoptimized");
 
 task checkEnvironmentVariables {
     if ("$System.env.JAVA_HOME" == "" || "$System.env.JAVA_HOME" == "null") {
@@ -130,7 +131,10 @@ task getCommitVersion {
 task generateRuntime {
     doFirst {
         tasks.generateOptimizedRuntimeAar.execute();
-        tasks.generateRuntimeAar.execute();
+
+        if (generateRegularRuntimePackage) {
+            tasks.generateRuntimeAar.execute();
+        }
     }
 }